Acer 7750G - Ati Radeon HD 6650M Color Depth

Posted 14 April 2013 - 01:22 AM

Basaaa

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Hi guys,

My Hackbook is almost perfect now. One thing that actually will make me go back to Windows however, is the wrong color depth. As I do alot of graphical work, I just can't accept those weird gradient colors. I use the DSDT and Ipomoea personality from http://www.insanelym...s-enabler-dsdt/ . I also tried injecting the EDID (that I extracted in a windows boot) via the Clover bootloader, and I tried the Aty_init kext. However I cannot get my LVDS display to display the corect colors. Colors look perfectly fine on HDMI and VGA though. Also I have full QE/CI with this setup. Also I downloaded the trial of SwitchResX, and forced it to go into billion of colors, however there is no change. When I change it to thousands of colors, it does change, but it's even worse.

This is kind of what I get, maybe a little less extreme:

The exact model of my laptop is Acer Aspire 7750G-2634G64Mnkk with the 6650M 1GB in it.

I would really appreciate any help from you guys, as I have now looked for days and days, and it's extremely frustrating that everything works except those colors. Working on Photoshop with those colors is just not gonna work.

Posted 16 April 2013 - 01:30 PM

Basaaa

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Well, I already contacted Trucker MK, who created the personality for his card, and he has the exact same problem, and has not succeeded yet in fixing it. So I don't think that's the problem?
Correct me if I'm wrong!

Posted 16 April 2013 - 02:09 PM

k3nny

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I see. Well, the least you can do is to check if Sense-, Transmitter-, and Encoder-IDs of his custom framebuffer match with the output you get from the decoder tools. These three are the main source of problems, I believe.

Posted 16 April 2013 - 02:11 PM

Basaaa

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Okay, will do.

I just noticed, and I really don't like this, that I only have OpenGL support till 2.1. I'm a game programmer, and I have to use OpenGL 3.1, please tell me there is a way to fix that? :S
On a Windows installation I have full support till 4.1.

Posted 16 April 2013 - 11:08 PM

p.H

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Okay, will do.

I just noticed, and I really don't like this, that I only have OpenGL support till 2.1. I'm a game programmer, and I have to use OpenGL 3.1, please tell me there is a way to fix that? :SOn a Windows installation I have full support till 4.1.

Posted 30 June 2013 - 05:46 AM

kako007

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I have the same exact issue with my AMD 7970M in both Mountain Lion and Mavericks and have not been able to solve it. I also tried swapping a friend's nVidia 680M in there and even though it pretty much worked OOB, I had the same color banding/depth issue. I have experimented a lot with modifying the framebuffer (Buri in ATI7000Controller.kext) to no luck. The following is the original connector and the modified one that is working fine but has the same color depth issue with my 7970M card: